Crossword Genius

It goes round in either direction (5)

Ross

I believe the answer is:

rotor

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'it goes round' is the definition.
(I've seen this before)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for rotor that I've seen before include "Revolving part of a machine, a palindrome" , "Turning part of an engine" , "device for lifting a chopper" , "part of chopper" , "Revolving dynamic part" .)

I've seen this clue in the Sydney Morning Herald.
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